author | never |
Wed, 27 Apr 2016 16:20:49 -0700 | |
changeset 38139 | cf6f5c1b7205 |
parent 35951 | eb6971bc8c95 |
child 38231 | 38b7e4a90f6a |
permissions | -rw-r--r-- |
33160 | 1 |
/* |
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* Copyright (c) 2011, 2016, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package jdk.vm.ci.hotspot; |
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import static java.util.Objects.requireNonNull; |
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import static jdk.vm.ci.hotspot.CompilerToVM.compilerToVM; |
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import static jdk.vm.ci.hotspot.HotSpotJVMCIRuntime.runtime; |
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import static jdk.vm.ci.hotspot.HotSpotVMConfig.config; |
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import static jdk.vm.ci.hotspot.UnsafeAccess.UNSAFE; |
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import java.lang.annotation.Annotation; |
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import java.lang.reflect.Array; |
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import java.lang.reflect.Constructor; |
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import java.lang.reflect.Method; |
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import java.lang.reflect.Modifier; |
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import java.nio.ByteOrder; |
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import java.util.ArrayList; |
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import java.util.Arrays; |
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import java.util.HashMap; |
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import jdk.vm.ci.common.JVMCIError; |
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import jdk.vm.ci.meta.Assumptions.AssumptionResult; |
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import jdk.vm.ci.meta.Assumptions.ConcreteMethod; |
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import jdk.vm.ci.meta.Assumptions.ConcreteSubtype; |
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import jdk.vm.ci.meta.Assumptions.LeafType; |
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import jdk.vm.ci.meta.Assumptions.NoFinalizableSubclass; |
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import jdk.vm.ci.meta.Constant; |
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import jdk.vm.ci.meta.JavaConstant; |
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import jdk.vm.ci.meta.JavaKind; |
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import jdk.vm.ci.meta.JavaType; |
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import jdk.vm.ci.meta.ModifiersProvider; |
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import jdk.vm.ci.meta.ResolvedJavaField; |
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import jdk.vm.ci.meta.ResolvedJavaMethod; |
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import jdk.vm.ci.meta.ResolvedJavaType; |
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import jdk.vm.ci.meta.TrustedInterface; |
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/** |
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* Implementation of {@link JavaType} for resolved non-primitive HotSpot classes. |
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*/ |
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final class HotSpotResolvedObjectTypeImpl extends HotSpotResolvedJavaType implements HotSpotResolvedObjectType, HotSpotProxified, MetaspaceWrapperObject { |
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/** |
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* The Java class this type represents. |
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*/ |
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private final Class<?> javaClass; |
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private HashMap<Long, HotSpotResolvedJavaField> fieldCache; |
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private HashMap<Long, HotSpotResolvedJavaMethodImpl> methodCache; |
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private HotSpotResolvedJavaField[] instanceFields; |
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private HotSpotResolvedObjectTypeImpl[] interfaces; |
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private HotSpotConstantPool constantPool; |
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final HotSpotJVMCIMetaAccessContext context; |
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private HotSpotResolvedObjectType arrayOfType; |
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/** |
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* Gets the JVMCI mirror for a {@link Class} object. |
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* |
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* @return the {@link HotSpotResolvedJavaType} corresponding to {@code javaClass} |
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*/ |
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static HotSpotResolvedObjectTypeImpl fromObjectClass(Class<?> javaClass) { |
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return (HotSpotResolvedObjectTypeImpl) runtime().fromClass(javaClass); |
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} |
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/** |
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* Gets the JVMCI mirror from a HotSpot type. Since {@link Class} is already a proxy for the |
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* underlying Klass*, it is used instead of the raw Klass*. |
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* |
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* Called from the VM. |
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* |
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* @param javaClass a {@link Class} object |
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* @return the {@link ResolvedJavaType} corresponding to {@code javaClass} |
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*/ |
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@SuppressWarnings("unused") |
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private static HotSpotResolvedObjectTypeImpl fromMetaspace(Class<?> javaClass) { |
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return fromObjectClass(javaClass); |
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} |
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/** |
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* Creates the JVMCI mirror for a {@link Class} object. |
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* |
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* <p> |
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* <b>NOTE</b>: Creating an instance of this class does not install the mirror for the |
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* {@link Class} type. Use {@link #fromObjectClass(Class)} or {@link #fromMetaspace(Class)} |
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* instead. |
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* </p> |
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* |
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* @param javaClass the Class to create the mirror for |
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* @param context |
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*/ |
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HotSpotResolvedObjectTypeImpl(Class<?> javaClass, HotSpotJVMCIMetaAccessContext context) { |
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super(getSignatureName(javaClass)); |
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this.javaClass = javaClass; |
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this.context = context; |
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assert getName().charAt(0) != '[' || isArray() : getName(); |
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} |
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/** |
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* Returns the name of this type as it would appear in a signature. |
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*/ |
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private static String getSignatureName(Class<?> javaClass) { |
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if (javaClass.isArray()) { |
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return javaClass.getName().replace('.', '/'); |
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} |
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return "L" + javaClass.getName().replace('.', '/') + ";"; |
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} |
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/** |
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* Gets the metaspace Klass for this type. |
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*/ |
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long getMetaspaceKlass() { |
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if (HotSpotJVMCIRuntime.getHostWordKind() == JavaKind.Long) { |
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return UNSAFE.getLong(javaClass, (long) config().klassOffset); |
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} |
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return UNSAFE.getInt(javaClass, (long) config().klassOffset) & 0xFFFFFFFFL; |
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} |
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public long getMetaspacePointer() { |
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return getMetaspaceKlass(); |
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} |
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@Override |
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public int getModifiers() { |
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if (isArray()) { |
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return (getElementalType().getModifiers() & (Modifier.PUBLIC | Modifier.PRIVATE | Modifier.PROTECTED)) | Modifier.FINAL | Modifier.ABSTRACT; |
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} else { |
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return getAccessFlags() & ModifiersProvider.jvmClassModifiers(); |
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} |
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} |
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public int getAccessFlags() { |
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HotSpotVMConfig config = config(); |
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return UNSAFE.getInt(getMetaspaceKlass() + config.klassAccessFlagsOffset); |
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} |
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@Override |
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public HotSpotResolvedObjectType getArrayClass() { |
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if (arrayOfType == null) { |
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arrayOfType = fromObjectClass(Array.newInstance(mirror(), 0).getClass()); |
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} |
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return arrayOfType; |
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} |
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@Override |
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public ResolvedJavaType getComponentType() { |
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Class<?> javaComponentType = mirror().getComponentType(); |
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return javaComponentType == null ? null : runtime().fromClass(javaComponentType); |
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} |
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@Override |
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public AssumptionResult<ResolvedJavaType> findLeafConcreteSubtype() { |
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HotSpotVMConfig config = config(); |
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if (isArray()) { |
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return getElementalType().isLeaf() ? new AssumptionResult<>(this) : null; |
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} else if (isInterface()) { |
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HotSpotResolvedObjectTypeImpl implementor = getSingleImplementor(); |
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/* |
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* If the implementor field contains itself that indicates that the interface has more |
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* than one implementors (see: InstanceKlass::add_implementor). |
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*/ |
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if (implementor == null || implementor.equals(this)) { |
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return null; |
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} |
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assert !implementor.isInterface(); |
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if (implementor.isAbstract() || !implementor.isLeafClass()) { |
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AssumptionResult<ResolvedJavaType> leafConcreteSubtype = implementor.findLeafConcreteSubtype(); |
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if (leafConcreteSubtype != null) { |
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assert !leafConcreteSubtype.getResult().equals(implementor); |
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AssumptionResult<ResolvedJavaType> newResult = new AssumptionResult<>(leafConcreteSubtype.getResult(), new ConcreteSubtype(this, implementor)); |
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// Accumulate leaf assumptions and return the combined result. |
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newResult.add(leafConcreteSubtype); |
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return newResult; |
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} |
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return null; |
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} |
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return new AssumptionResult<>(implementor, new LeafType(implementor), new ConcreteSubtype(this, implementor)); |
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} else { |
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HotSpotResolvedObjectTypeImpl type = this; |
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while (type.isAbstract()) { |
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HotSpotResolvedObjectTypeImpl subklass = type.getSubklass(); |
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if (subklass == null || UNSAFE.getAddress(subklass.getMetaspaceKlass() + config.nextSiblingOffset) != 0) { |
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return null; |
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} |
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type = subklass; |
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} |
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if (type.isAbstract() || type.isInterface() || !type.isLeafClass()) { |
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return null; |
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} |
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if (this.isAbstract()) { |
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return new AssumptionResult<>(type, new LeafType(type), new ConcreteSubtype(this, type)); |
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} else { |
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assert this.equals(type); |
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return new AssumptionResult<>(type, new LeafType(type)); |
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} |
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} |
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} |
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/** |
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* Returns if type {@code type} is a leaf class. This is the case if the |
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* {@code Klass::_subklass} field of the underlying class is zero. |
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* |
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* @return true if the type is a leaf class |
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*/ |
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private boolean isLeafClass() { |
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return getSubklass() == null; |
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} |
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/** |
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* Returns the {@code Klass::_subklass} field of the underlying metaspace klass for the given |
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* type {@code type}. |
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* |
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* @return value of the subklass field as metaspace klass pointer |
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*/ |
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private HotSpotResolvedObjectTypeImpl getSubklass() { |
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return compilerToVM().getResolvedJavaType(this, config().subklassOffset, false); |
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} |
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@Override |
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public HotSpotResolvedObjectTypeImpl getSuperclass() { |
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Class<?> javaSuperclass = mirror().getSuperclass(); |
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return javaSuperclass == null ? null : fromObjectClass(javaSuperclass); |
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} |
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@Override |
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public HotSpotResolvedObjectTypeImpl[] getInterfaces() { |
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if (interfaces == null) { |
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Class<?>[] javaInterfaces = mirror().getInterfaces(); |
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HotSpotResolvedObjectTypeImpl[] result = new HotSpotResolvedObjectTypeImpl[javaInterfaces.length]; |
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for (int i = 0; i < javaInterfaces.length; i++) { |
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result[i] = fromObjectClass(javaInterfaces[i]); |
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} |
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interfaces = result; |
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} |
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return interfaces; |
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} |
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@Override |
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public HotSpotResolvedObjectTypeImpl getSingleImplementor() { |
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if (!isInterface()) { |
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throw new JVMCIError("Cannot call getSingleImplementor() on a non-interface type: %s", this); |
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} |
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return compilerToVM().getImplementor(this); |
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} |
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public HotSpotResolvedObjectTypeImpl getSupertype() { |
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if (isArray()) { |
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ResolvedJavaType componentType = getComponentType(); |
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if (mirror() == Object[].class || componentType.isPrimitive()) { |
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return fromObjectClass(Object.class); |
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} |
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return (HotSpotResolvedObjectTypeImpl) ((HotSpotResolvedObjectTypeImpl) componentType).getSupertype().getArrayClass(); |
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} |
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if (isInterface()) { |
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return fromObjectClass(Object.class); |
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} |
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return getSuperclass(); |
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} |
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@Override |
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public HotSpotResolvedObjectType findLeastCommonAncestor(ResolvedJavaType otherType) { |
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if (otherType.isPrimitive()) { |
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return null; |
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} else { |
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HotSpotResolvedObjectTypeImpl t1 = this; |
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HotSpotResolvedObjectTypeImpl t2 = (HotSpotResolvedObjectTypeImpl) otherType; |
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while (true) { |
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if (t1.isAssignableFrom(t2)) { |
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return t1; |
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} |
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if (t2.isAssignableFrom(t1)) { |
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return t2; |
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} |
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t1 = t1.getSupertype(); |
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t2 = t2.getSupertype(); |
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} |
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} |
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} |
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@Override |
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public HotSpotResolvedObjectType asExactType() { |
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return isLeaf() ? this : null; |
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} |
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@Override |
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public AssumptionResult<Boolean> hasFinalizableSubclass() { |
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assert !isArray(); |
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if (!compilerToVM().hasFinalizableSubclass(this)) { |
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return new AssumptionResult<>(false, new NoFinalizableSubclass(this)); |
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} |
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return new AssumptionResult<>(true); |
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} |
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@Override |
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public boolean hasFinalizer() { |
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return (getAccessFlags() & config().jvmAccHasFinalizer) != 0; |
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} |
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@Override |
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public boolean isPrimitive() { |
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return false; |
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} |
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@Override |
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public boolean isArray() { |
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return mirror().isArray(); |
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} |
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@Override |
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public boolean isInitialized() { |
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return isArray() ? true : getInitState() == config().instanceKlassStateFullyInitialized; |
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} |
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@Override |
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public boolean isLinked() { |
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return isArray() ? true : getInitState() >= config().instanceKlassStateLinked; |
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} |
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/** |
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* Returns the value of the state field {@code InstanceKlass::_init_state} of the metaspace |
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* klass. |
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* |
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* @return state field value of this type |
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*/ |
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private int getInitState() { |
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assert !isArray() : "_init_state only exists in InstanceKlass"; |
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return UNSAFE.getByte(getMetaspaceKlass() + config().instanceKlassInitStateOffset) & 0xFF; |
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} |
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@Override |
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public void initialize() { |
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if (!isInitialized()) { |
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UNSAFE.ensureClassInitialized(mirror()); |
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assert isInitialized(); |
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} |
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} |
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@Override |
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public boolean isInstance(JavaConstant obj) { |
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if (obj.getJavaKind() == JavaKind.Object && !obj.isNull()) { |
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return mirror().isInstance(((HotSpotObjectConstantImpl) obj).object()); |
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} |
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return false; |
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} |
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@Override |
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366 |
public boolean isInstanceClass() { |
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return !isArray() && !isInterface(); |
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} |
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@Override |
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public boolean isInterface() { |
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return mirror().isInterface(); |
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} |
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@Override |
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376 |
public boolean isAssignableFrom(ResolvedJavaType other) { |
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assert other != null; |
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378 |
if (other instanceof HotSpotResolvedObjectTypeImpl) { |
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HotSpotResolvedObjectTypeImpl otherType = (HotSpotResolvedObjectTypeImpl) other; |
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return mirror().isAssignableFrom(otherType.mirror()); |
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} |
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return false; |
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383 |
} |
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385 |
@Override |
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386 |
public boolean isJavaLangObject() { |
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387 |
return javaClass.equals(Object.class); |
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} |
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390 |
@Override |
|
391 |
public JavaKind getJavaKind() { |
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return JavaKind.Object; |
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} |
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@Override |
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public ResolvedJavaMethod resolveMethod(ResolvedJavaMethod method, ResolvedJavaType callerType) { |
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assert !callerType.isArray(); |
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if (isInterface()) { |
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// Methods can only be resolved against concrete types |
33160 | 400 |
return null; |
401 |
} |
|
402 |
if (method.isConcrete() && method.getDeclaringClass().equals(this) && method.isPublic()) { |
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403 |
return method; |
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404 |
} |
|
405 |
if (!method.getDeclaringClass().isAssignableFrom(this)) { |
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return null; |
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407 |
} |
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408 |
HotSpotResolvedJavaMethodImpl hotSpotMethod = (HotSpotResolvedJavaMethodImpl) method; |
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409 |
HotSpotResolvedObjectTypeImpl hotSpotCallerType = (HotSpotResolvedObjectTypeImpl) callerType; |
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33632 | 410 |
return compilerToVM().resolveMethod(this, hotSpotMethod, hotSpotCallerType); |
33160 | 411 |
} |
412 |
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413 |
public HotSpotConstantPool getConstantPool() { |
|
414 |
if (constantPool == null) { |
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33632 | 415 |
constantPool = compilerToVM().getConstantPool(this, config().instanceKlassConstantsOffset); |
33160 | 416 |
} |
417 |
return constantPool; |
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418 |
} |
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419 |
||
420 |
/** |
|
421 |
* Gets the instance size of this type. If an instance of this type cannot be fast path |
|
422 |
* allocated, then the returned value is negative (its absolute value gives the size). Must not |
|
423 |
* be called if this is an array or interface type. |
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424 |
*/ |
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425 |
public int instanceSize() { |
|
426 |
assert !isArray(); |
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427 |
assert !isInterface(); |
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428 |
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33632 | 429 |
HotSpotVMConfig config = config(); |
33160 | 430 |
final int layoutHelper = layoutHelper(); |
431 |
assert layoutHelper > config.klassLayoutHelperNeutralValue : "must be instance"; |
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432 |
||
433 |
// See: Klass::layout_helper_size_in_bytes |
|
434 |
int size = layoutHelper & ~config.klassLayoutHelperInstanceSlowPathBit; |
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435 |
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436 |
// See: Klass::layout_helper_needs_slow_path |
|
437 |
boolean needsSlowPath = (layoutHelper & config.klassLayoutHelperInstanceSlowPathBit) != 0; |
|
438 |
||
439 |
return needsSlowPath ? -size : size; |
|
440 |
} |
|
441 |
||
442 |
public int layoutHelper() { |
|
33632 | 443 |
HotSpotVMConfig config = config(); |
33160 | 444 |
return UNSAFE.getInt(getMetaspaceKlass() + config.klassLayoutHelperOffset); |
445 |
} |
|
446 |
||
447 |
synchronized HotSpotResolvedJavaMethod createMethod(long metaspaceMethod) { |
|
448 |
HotSpotResolvedJavaMethodImpl method = null; |
|
449 |
if (methodCache == null) { |
|
450 |
methodCache = new HashMap<>(8); |
|
451 |
} else { |
|
452 |
method = methodCache.get(metaspaceMethod); |
|
453 |
} |
|
454 |
if (method == null) { |
|
455 |
method = new HotSpotResolvedJavaMethodImpl(this, metaspaceMethod); |
|
456 |
methodCache.put(metaspaceMethod, method); |
|
457 |
context.add(method); |
|
458 |
} |
|
459 |
return method; |
|
460 |
} |
|
461 |
||
462 |
public int getVtableLength() { |
|
33632 | 463 |
HotSpotVMConfig config = config(); |
33160 | 464 |
if (isInterface() || isArray()) { |
465 |
/* Everything has the core vtable of java.lang.Object */ |
|
466 |
return config.baseVtableLength(); |
|
467 |
} |
|
35899 | 468 |
int result = UNSAFE.getInt(getMetaspaceKlass() + config.klassVtableLengthOffset) / (config.vtableEntrySize / config.heapWordSize); |
469 |
assert result >= config.baseVtableLength() : UNSAFE.getInt(getMetaspaceKlass() + config.klassVtableLengthOffset) + " " + config.vtableEntrySize; |
|
33160 | 470 |
return result; |
471 |
} |
|
472 |
||
473 |
public synchronized HotSpotResolvedJavaField createField(String fieldName, JavaType type, long offset, int rawFlags) { |
|
474 |
HotSpotResolvedJavaField result = null; |
|
475 |
||
476 |
final int flags = rawFlags & ModifiersProvider.jvmFieldModifiers(); |
|
477 |
||
478 |
final long id = offset + ((long) flags << 32); |
|
479 |
||
480 |
// Must cache the fields, because the local load elimination only works if the |
|
481 |
// objects from two field lookups are identical. |
|
482 |
if (fieldCache == null) { |
|
483 |
fieldCache = new HashMap<>(8); |
|
484 |
} else { |
|
485 |
result = fieldCache.get(id); |
|
486 |
} |
|
487 |
||
488 |
if (result == null) { |
|
489 |
result = new HotSpotResolvedJavaFieldImpl(this, fieldName, type, offset, rawFlags); |
|
490 |
fieldCache.put(id, result); |
|
491 |
} else { |
|
492 |
assert result.getName().equals(fieldName); |
|
493 |
// assert result.getType().equals(type); |
|
494 |
assert result.offset() == offset; |
|
495 |
assert result.getModifiers() == flags; |
|
496 |
} |
|
497 |
||
498 |
return result; |
|
499 |
} |
|
500 |
||
501 |
@Override |
|
502 |
public AssumptionResult<ResolvedJavaMethod> findUniqueConcreteMethod(ResolvedJavaMethod method) { |
|
503 |
HotSpotResolvedJavaMethod hmethod = (HotSpotResolvedJavaMethod) method; |
|
504 |
HotSpotResolvedObjectType declaredHolder = hmethod.getDeclaringClass(); |
|
505 |
/* |
|
506 |
* Sometimes the receiver type in the graph hasn't stabilized to a subtype of declared |
|
507 |
* holder, usually because of phis, so make sure that the type is related to the declared |
|
508 |
* type before using it for lookup. Unlinked types should also be ignored because we can't |
|
509 |
* resolve the proper method to invoke. Generally unlinked types in invokes should result in |
|
510 |
* a deopt instead since they can't really be used if they aren't linked yet. |
|
511 |
*/ |
|
512 |
if (!declaredHolder.isAssignableFrom(this) || this.isArray() || this.equals(declaredHolder) || !isLinked() || isInterface()) { |
|
513 |
ResolvedJavaMethod result = hmethod.uniqueConcreteMethod(declaredHolder); |
|
514 |
if (result != null) { |
|
515 |
return new AssumptionResult<>(result, new ConcreteMethod(method, declaredHolder, result)); |
|
516 |
} |
|
517 |
return null; |
|
518 |
} |
|
519 |
/* |
|
520 |
* The holder may be a subtype of the declaredHolder so make sure to resolve the method to |
|
521 |
* the correct method for the subtype. |
|
522 |
*/ |
|
523 |
HotSpotResolvedJavaMethod resolvedMethod = (HotSpotResolvedJavaMethod) resolveMethod(hmethod, this); |
|
524 |
if (resolvedMethod == null) { |
|
525 |
// The type isn't known to implement the method. |
|
526 |
return null; |
|
527 |
} |
|
528 |
||
529 |
ResolvedJavaMethod result = resolvedMethod.uniqueConcreteMethod(this); |
|
530 |
if (result != null) { |
|
531 |
return new AssumptionResult<>(result, new ConcreteMethod(method, this, result)); |
|
532 |
} |
|
533 |
return null; |
|
534 |
} |
|
535 |
||
536 |
/** |
|
537 |
* This class represents the field information for one field contained in the fields array of an |
|
538 |
* {@code InstanceKlass}. The implementation is similar to the native {@code FieldInfo} class. |
|
539 |
*/ |
|
540 |
private class FieldInfo { |
|
541 |
/** |
|
542 |
* Native pointer into the array of Java shorts. |
|
543 |
*/ |
|
544 |
private final long metaspaceData; |
|
545 |
||
546 |
/** |
|
547 |
* Creates a field info for the field in the fields array at index {@code index}. |
|
548 |
* |
|
549 |
* @param index index to the fields array |
|
550 |
*/ |
|
35837 | 551 |
FieldInfo(int index) { |
33632 | 552 |
HotSpotVMConfig config = config(); |
33160 | 553 |
// Get Klass::_fields |
554 |
final long metaspaceFields = UNSAFE.getAddress(getMetaspaceKlass() + config.instanceKlassFieldsOffset); |
|
555 |
assert config.fieldInfoFieldSlots == 6 : "revisit the field parsing code"; |
|
556 |
metaspaceData = metaspaceFields + config.arrayU2DataOffset + config.fieldInfoFieldSlots * Short.BYTES * index; |
|
557 |
} |
|
558 |
||
559 |
private int getAccessFlags() { |
|
33632 | 560 |
return readFieldSlot(config().fieldInfoAccessFlagsOffset); |
33160 | 561 |
} |
562 |
||
563 |
private int getNameIndex() { |
|
33632 | 564 |
return readFieldSlot(config().fieldInfoNameIndexOffset); |
33160 | 565 |
} |
566 |
||
567 |
private int getSignatureIndex() { |
|
33632 | 568 |
return readFieldSlot(config().fieldInfoSignatureIndexOffset); |
33160 | 569 |
} |
570 |
||
571 |
public int getOffset() { |
|
33632 | 572 |
HotSpotVMConfig config = config(); |
33160 | 573 |
final int lowPacked = readFieldSlot(config.fieldInfoLowPackedOffset); |
574 |
final int highPacked = readFieldSlot(config.fieldInfoHighPackedOffset); |
|
575 |
final int offset = ((highPacked << Short.SIZE) | lowPacked) >> config.fieldInfoTagSize; |
|
576 |
return offset; |
|
577 |
} |
|
578 |
||
579 |
/** |
|
580 |
* Helper method to read an entry (slot) from the field array. Currently field info is laid |
|
581 |
* on top an array of Java shorts. |
|
582 |
*/ |
|
583 |
private int readFieldSlot(int index) { |
|
584 |
return UNSAFE.getChar(metaspaceData + Short.BYTES * index); |
|
585 |
} |
|
586 |
||
587 |
/** |
|
588 |
* Returns the name of this field as a {@link String}. If the field is an internal field the |
|
589 |
* name index is pointing into the vmSymbols table. |
|
590 |
*/ |
|
591 |
public String getName() { |
|
592 |
final int nameIndex = getNameIndex(); |
|
593 |
return isInternal() ? HotSpotVmSymbols.symbolAt(nameIndex) : getConstantPool().lookupUtf8(nameIndex); |
|
594 |
} |
|
595 |
||
596 |
/** |
|
597 |
* Returns the signature of this field as {@link String}. If the field is an internal field |
|
598 |
* the signature index is pointing into the vmSymbols table. |
|
599 |
*/ |
|
600 |
public String getSignature() { |
|
601 |
final int signatureIndex = getSignatureIndex(); |
|
602 |
return isInternal() ? HotSpotVmSymbols.symbolAt(signatureIndex) : getConstantPool().lookupUtf8(signatureIndex); |
|
603 |
} |
|
604 |
||
605 |
public JavaType getType() { |
|
606 |
String signature = getSignature(); |
|
607 |
return runtime().lookupType(signature, HotSpotResolvedObjectTypeImpl.this, false); |
|
608 |
} |
|
609 |
||
610 |
private boolean isInternal() { |
|
33632 | 611 |
return (getAccessFlags() & config().jvmAccFieldInternal) != 0; |
33160 | 612 |
} |
613 |
||
614 |
public boolean isStatic() { |
|
615 |
return Modifier.isStatic(getAccessFlags()); |
|
616 |
} |
|
617 |
||
618 |
public boolean hasGenericSignature() { |
|
33632 | 619 |
return (getAccessFlags() & config().jvmAccFieldHasGenericSignature) != 0; |
33160 | 620 |
} |
621 |
} |
|
622 |
||
623 |
private static class OffsetComparator implements java.util.Comparator<HotSpotResolvedJavaField> { |
|
624 |
@Override |
|
625 |
public int compare(HotSpotResolvedJavaField o1, HotSpotResolvedJavaField o2) { |
|
626 |
return o1.offset() - o2.offset(); |
|
627 |
} |
|
628 |
} |
|
629 |
||
630 |
@Override |
|
631 |
public ResolvedJavaField[] getInstanceFields(boolean includeSuperclasses) { |
|
632 |
if (instanceFields == null) { |
|
633 |
if (isArray() || isInterface()) { |
|
634 |
instanceFields = new HotSpotResolvedJavaField[0]; |
|
635 |
} else { |
|
636 |
final int fieldCount = getFieldCount(); |
|
637 |
ArrayList<HotSpotResolvedJavaField> fieldsArray = new ArrayList<>(fieldCount); |
|
638 |
||
639 |
for (int i = 0; i < fieldCount; i++) { |
|
640 |
FieldInfo field = new FieldInfo(i); |
|
641 |
||
642 |
// We are only interested in instance fields. |
|
643 |
if (!field.isStatic()) { |
|
644 |
HotSpotResolvedJavaField resolvedJavaField = createField(field.getName(), field.getType(), field.getOffset(), field.getAccessFlags()); |
|
645 |
fieldsArray.add(resolvedJavaField); |
|
646 |
} |
|
647 |
} |
|
648 |
||
649 |
fieldsArray.sort(new OffsetComparator()); |
|
650 |
||
651 |
HotSpotResolvedJavaField[] myFields = fieldsArray.toArray(new HotSpotResolvedJavaField[0]); |
|
652 |
||
653 |
if (mirror() != Object.class) { |
|
654 |
HotSpotResolvedJavaField[] superFields = (HotSpotResolvedJavaField[]) getSuperclass().getInstanceFields(true); |
|
655 |
HotSpotResolvedJavaField[] fields = Arrays.copyOf(superFields, superFields.length + myFields.length); |
|
656 |
System.arraycopy(myFields, 0, fields, superFields.length, myFields.length); |
|
657 |
instanceFields = fields; |
|
658 |
} else { |
|
659 |
assert myFields.length == 0 : "java.lang.Object has fields!"; |
|
660 |
instanceFields = myFields; |
|
661 |
} |
|
662 |
||
663 |
} |
|
664 |
} |
|
665 |
if (!includeSuperclasses) { |
|
666 |
int myFieldsStart = 0; |
|
667 |
while (myFieldsStart < instanceFields.length && !instanceFields[myFieldsStart].getDeclaringClass().equals(this)) { |
|
668 |
myFieldsStart++; |
|
669 |
} |
|
670 |
if (myFieldsStart == 0) { |
|
671 |
return instanceFields; |
|
672 |
} |
|
673 |
if (myFieldsStart == instanceFields.length) { |
|
674 |
return new HotSpotResolvedJavaField[0]; |
|
675 |
} |
|
676 |
return Arrays.copyOfRange(instanceFields, myFieldsStart, instanceFields.length); |
|
677 |
} |
|
678 |
return instanceFields; |
|
679 |
} |
|
680 |
||
681 |
@Override |
|
682 |
public ResolvedJavaField[] getStaticFields() { |
|
683 |
if (isArray()) { |
|
684 |
return new HotSpotResolvedJavaField[0]; |
|
685 |
} else { |
|
686 |
final int fieldCount = getFieldCount(); |
|
687 |
ArrayList<HotSpotResolvedJavaField> fieldsArray = new ArrayList<>(fieldCount); |
|
688 |
||
689 |
for (int i = 0; i < fieldCount; i++) { |
|
690 |
FieldInfo field = new FieldInfo(i); |
|
691 |
||
692 |
// We are only interested in static fields. |
|
693 |
if (field.isStatic()) { |
|
694 |
HotSpotResolvedJavaField resolvedJavaField = createField(field.getName(), field.getType(), field.getOffset(), field.getAccessFlags()); |
|
695 |
fieldsArray.add(resolvedJavaField); |
|
696 |
} |
|
697 |
} |
|
698 |
||
699 |
fieldsArray.sort(new OffsetComparator()); |
|
700 |
return fieldsArray.toArray(new HotSpotResolvedJavaField[fieldsArray.size()]); |
|
701 |
} |
|
702 |
} |
|
703 |
||
704 |
/** |
|
705 |
* Returns the actual field count of this class's internal {@code InstanceKlass::_fields} array |
|
706 |
* by walking the array and discounting the generic signature slots at the end of the array. |
|
707 |
* |
|
708 |
* <p> |
|
709 |
* See {@code FieldStreamBase::init_generic_signature_start_slot} |
|
710 |
*/ |
|
711 |
private int getFieldCount() { |
|
33632 | 712 |
HotSpotVMConfig config = config(); |
33160 | 713 |
final long metaspaceFields = UNSAFE.getAddress(getMetaspaceKlass() + config.instanceKlassFieldsOffset); |
714 |
int metaspaceFieldsLength = UNSAFE.getInt(metaspaceFields + config.arrayU1LengthOffset); |
|
715 |
int fieldCount = 0; |
|
716 |
||
717 |
for (int i = 0, index = 0; i < metaspaceFieldsLength; i += config.fieldInfoFieldSlots, index++) { |
|
718 |
FieldInfo field = new FieldInfo(index); |
|
719 |
if (field.hasGenericSignature()) { |
|
720 |
metaspaceFieldsLength--; |
|
721 |
} |
|
722 |
fieldCount++; |
|
723 |
} |
|
724 |
return fieldCount; |
|
725 |
} |
|
726 |
||
727 |
@Override |
|
728 |
public Class<?> mirror() { |
|
729 |
return javaClass; |
|
730 |
} |
|
731 |
||
732 |
@Override |
|
733 |
public String getSourceFileName() { |
|
33632 | 734 |
HotSpotVMConfig config = config(); |
33160 | 735 |
final int sourceFileNameIndex = UNSAFE.getChar(getMetaspaceKlass() + config.instanceKlassSourceFileNameIndexOffset); |
736 |
if (sourceFileNameIndex == 0) { |
|
737 |
return null; |
|
738 |
} |
|
739 |
return getConstantPool().lookupUtf8(sourceFileNameIndex); |
|
740 |
} |
|
741 |
||
742 |
@Override |
|
743 |
public Annotation[] getAnnotations() { |
|
744 |
return mirror().getAnnotations(); |
|
745 |
} |
|
746 |
||
747 |
@Override |
|
748 |
public <T extends Annotation> T getAnnotation(Class<T> annotationClass) { |
|
749 |
return mirror().getAnnotation(annotationClass); |
|
750 |
} |
|
751 |
||
752 |
/** |
|
753 |
* Performs a fast-path check that this type is resolved in the context of a given accessing |
|
754 |
* class. A negative result does not mean this type is not resolved with respect to |
|
755 |
* {@code accessingClass}. That can only be determined by |
|
756 |
* {@linkplain HotSpotJVMCIRuntime#lookupType(String, HotSpotResolvedObjectType, boolean) |
|
757 |
* re-resolving} the type. |
|
758 |
*/ |
|
759 |
public boolean isDefinitelyResolvedWithRespectTo(ResolvedJavaType accessingClass) { |
|
760 |
assert accessingClass != null; |
|
761 |
ResolvedJavaType elementType = getElementalType(); |
|
762 |
if (elementType.isPrimitive()) { |
|
763 |
// Primitive type resolution is context free. |
|
764 |
return true; |
|
765 |
} |
|
766 |
if (elementType.getName().startsWith("Ljava/")) { |
|
767 |
// Classes in a java.* package can only be defined by the |
|
768 |
// boot class loader. This is enforced by ClassLoader.preDefineClass() |
|
769 |
assert mirror().getClassLoader() == null; |
|
770 |
return true; |
|
771 |
} |
|
772 |
ClassLoader thisCl = mirror().getClassLoader(); |
|
773 |
ClassLoader accessingClassCl = ((HotSpotResolvedObjectTypeImpl) accessingClass).mirror().getClassLoader(); |
|
774 |
return thisCl == accessingClassCl; |
|
775 |
} |
|
776 |
||
777 |
@Override |
|
778 |
public ResolvedJavaType resolve(ResolvedJavaType accessingClass) { |
|
779 |
if (isDefinitelyResolvedWithRespectTo(requireNonNull(accessingClass))) { |
|
780 |
return this; |
|
781 |
} |
|
782 |
HotSpotResolvedObjectTypeImpl accessingType = (HotSpotResolvedObjectTypeImpl) accessingClass; |
|
783 |
return (ResolvedJavaType) runtime().lookupType(getName(), accessingType, true); |
|
784 |
} |
|
785 |
||
786 |
/** |
|
787 |
* Gets the metaspace Klass boxed in a {@link JavaConstant}. |
|
788 |
*/ |
|
33632 | 789 |
public Constant klass() { |
790 |
return HotSpotMetaspaceConstantImpl.forMetaspaceObject(this, false); |
|
33160 | 791 |
} |
792 |
||
793 |
public boolean isPrimaryType() { |
|
33632 | 794 |
return config().secondarySuperCacheOffset != superCheckOffset(); |
33160 | 795 |
} |
796 |
||
797 |
public int superCheckOffset() { |
|
33632 | 798 |
HotSpotVMConfig config = config(); |
33160 | 799 |
return UNSAFE.getInt(getMetaspaceKlass() + config.superCheckOffsetOffset); |
800 |
} |
|
801 |
||
802 |
public long prototypeMarkWord() { |
|
33632 | 803 |
HotSpotVMConfig config = config(); |
33160 | 804 |
if (isArray()) { |
805 |
return config.arrayPrototypeMarkWord(); |
|
806 |
} else { |
|
807 |
return UNSAFE.getAddress(getMetaspaceKlass() + config.prototypeMarkWordOffset); |
|
808 |
} |
|
809 |
} |
|
810 |
||
811 |
@Override |
|
812 |
public ResolvedJavaField findInstanceFieldWithOffset(long offset, JavaKind expectedEntryKind) { |
|
813 |
ResolvedJavaField[] declaredFields = getInstanceFields(true); |
|
814 |
for (ResolvedJavaField field : declaredFields) { |
|
815 |
HotSpotResolvedJavaField resolvedField = (HotSpotResolvedJavaField) field; |
|
816 |
long resolvedFieldOffset = resolvedField.offset(); |
|
817 |
// @formatter:off |
|
818 |
if (ByteOrder.nativeOrder() == ByteOrder.BIG_ENDIAN && |
|
819 |
expectedEntryKind.isPrimitive() && |
|
820 |
!expectedEntryKind.equals(JavaKind.Void) && |
|
821 |
resolvedField.getJavaKind().isPrimitive()) { |
|
822 |
resolvedFieldOffset += |
|
823 |
resolvedField.getJavaKind().getByteCount() - |
|
824 |
Math.min(resolvedField.getJavaKind().getByteCount(), 4 + expectedEntryKind.getByteCount()); |
|
825 |
} |
|
826 |
if (resolvedFieldOffset == offset) { |
|
827 |
return field; |
|
828 |
} |
|
829 |
// @formatter:on |
|
830 |
} |
|
831 |
return null; |
|
832 |
} |
|
833 |
||
834 |
@Override |
|
835 |
public boolean isLocal() { |
|
836 |
return mirror().isLocalClass(); |
|
837 |
} |
|
838 |
||
839 |
@Override |
|
840 |
public boolean isMember() { |
|
841 |
return mirror().isMemberClass(); |
|
842 |
} |
|
843 |
||
844 |
@Override |
|
845 |
public HotSpotResolvedObjectTypeImpl getEnclosingType() { |
|
846 |
final Class<?> encl = mirror().getEnclosingClass(); |
|
847 |
return encl == null ? null : fromObjectClass(encl); |
|
848 |
} |
|
849 |
||
850 |
@Override |
|
851 |
public ResolvedJavaMethod[] getDeclaredConstructors() { |
|
852 |
Constructor<?>[] constructors = mirror().getDeclaredConstructors(); |
|
853 |
ResolvedJavaMethod[] result = new ResolvedJavaMethod[constructors.length]; |
|
854 |
for (int i = 0; i < constructors.length; i++) { |
|
855 |
result[i] = runtime().getHostJVMCIBackend().getMetaAccess().lookupJavaMethod(constructors[i]); |
|
856 |
assert result[i].isConstructor(); |
|
857 |
} |
|
858 |
return result; |
|
859 |
} |
|
860 |
||
861 |
@Override |
|
862 |
public ResolvedJavaMethod[] getDeclaredMethods() { |
|
863 |
Method[] methods = mirror().getDeclaredMethods(); |
|
864 |
ResolvedJavaMethod[] result = new ResolvedJavaMethod[methods.length]; |
|
865 |
for (int i = 0; i < methods.length; i++) { |
|
866 |
result[i] = runtime().getHostJVMCIBackend().getMetaAccess().lookupJavaMethod(methods[i]); |
|
867 |
assert !result[i].isConstructor(); |
|
868 |
} |
|
869 |
return result; |
|
870 |
} |
|
871 |
||
872 |
public ResolvedJavaMethod getClassInitializer() { |
|
33632 | 873 |
return compilerToVM().getClassInitializer(this); |
33160 | 874 |
} |
875 |
||
876 |
@Override |
|
877 |
public String toString() { |
|
878 |
return "HotSpotType<" + getName() + ", resolved>"; |
|
879 |
} |
|
880 |
||
881 |
@Override |
|
882 |
public boolean isTrustedInterfaceType() { |
|
883 |
return TrustedInterface.class.isAssignableFrom(mirror()); |
|
884 |
} |
|
885 |
} |